ABSTRACT
Even though it has been a long time since I went to school, I can still remember my mathematics teacher’s support, “Say it in your own words.” She wanted me to express my personal constructs about the mathematical topic being discussed. She was not interested in whether I could repeat the exact words of the textbook but, instead, how I had understood the matter. She was an example of what it is to be good mathematics teacher and a practical constructivist.
